*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    
}
body{
    height: 200vh;
    
}
.tou{
     position: fixed;
     top: 0;
     left: 0;
     padding: 25px 100px;
     width: 100%;
     display: flex;
     justify-content: space-between;
     align-items: center;
    transition:  0.5s;
    background-color: rgb(148, 148, 247);
 }
.logo{
     position: relative;
     font-size: 22px;
     font-weight: 900;
     letter-spacing: 1px;
     color:rgb(5, 5, 5);
 }
 .logo::before{
    content: '';
    position: absolute;
    left: -50px;
    top: -15px;
    width: 50px;
    height: 50px;
    background-size: 100%;
 }
 .biao{
     display: flex;
     justify-content: center;
     align-content: center;
    list-style: none;
    
 }
.biao li{
     position: relative;
     width: 200px;
 }
.biao a{
     position: relative;
     margin: 0 10px;
     font-size: 18px;
     font-family: 'fangsong';
     font-weight: bold;
     color: rgb(5, 5, 5);
     text-decoration: none;

 }
.bian{
    padding: 15px 100px;
    background-color:royalblue;
}
.bian .logo,.tou.bian a{
    color: rgb(252, 247, 247);
}
/*  背景图样式 */
.bjimg {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
min-width: 1000px;
z-index: -10;
zoom: 1;
background-color: #fff;
background-image: url(11.jpg) ;
background-repeat: no-repeat;
background-size: cover;
-webkit-background-size: cover;
-o-background-size: cover;
background-position: center 0;
}



/*div.search {padding: 30px 0;}*/

form {
    position: relative;
    width: 300px;
    margin: 0 auto;
}

input, button {
    border: none;
    outline: none;
}

input {
    width: 100%;
    height: 42px;
    padding-left: 13px;
}

button {
    height: 42px;
    width: 42px;
    cursor: pointer;
    position: absolute;
}

/*搜索框4*/
.bar4 form {
    background: rgb(127, 227, 245);
    border-bottom: 2px solid rgb(85, 85, 187);
    width: 300px;
}
.bar4 input, .bar4 button {
    background: transparent;
}
.bar4 button {
    top: 0;
    right: 0;
}
.bar4 button:before {
    content: "\f178";
    font-family: FontAwesome;
    font-size: 20px;
    color: #be290e;
}